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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. 4 Flat
  4. No Tow Package
  5. Trailer Hitch Wiring
  6. Vehicle End Connector
THIS ITEM IS NOT A FIT FOR
1999 Honda Passport
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CURT

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Part Number: C56402
12 Reviews | 8 Questions
In Stock
$87.70
 Custom Fit Vehicle Wiring
Not Confirmed to Fit

1999 Honda Passport

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curt custom fit vehicle wiring trailer hitch 4 flat t-connector harness with 4-pole connector
curt custom fit vehicle wiring trailer hitch end connector
curt custom fit vehicle wiring end connector 4 flat c56402
curt custom fit vehicle wiring end connector 4 flat
curt custom fit vehicle wiring trailer hitch plug-in
curt custom fit vehicle wiring end connector plug-in c56402
curt custom fit vehicle wiring trailer hitch plug-in t-connector harness with 4-pole flat connector
curt custom fit vehicle wiring 4 flat plug-in c56402

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In Use/Installed

2018 honda accord custom fit vehicle wiring curt end connector 4 flat c56402
2018 honda accord custom fit vehicle wiring curt trailer hitch plug-in on a
2018 honda accord custom fit vehicle wiring curt trailer hitch end connector on a
2018 honda accord custom fit vehicle wiring curt 4 flat plug-in c56402
2018 honda accord custom fit vehicle wiring curt end connector plug-in c56402
2018 honda accord custom fit vehicle wiring curt trailer hitch 4 flat t-connector harness with 4-pole connector
2018 honda accord custom fit vehicle wiring curt trailer hitch plug-in t-connector harness with 4-pole flat connector
2018 honda accord custom fit vehicle wiring curt end connector 4 flat on a

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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56402 or order online at etrailer.com. Free expert support on all CURT products. Great prices and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (12)
  • Q & A (0)
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CURT Custom Fit Vehicle Wiring - C56402

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow Without Factory Prep: 4-way flat connector powers trailer brake, turn, and tail lights.
  • Plug-and-Play Install: T-connector plugs inline with vehicle wiring—no cutting or splicing.
  • Powered Converter: Protects vehicle’s electronics by drawing power directly from battery.
  • Clean Interior Mount: Installs inside trunk for secure, weather-protected wiring.
  • Ready for Future Upgrades: Works with 7-way or adapter plugs for different trailer types.

Features to know about

Installs Cleanly Inside the Trunk: Protected, Hidden Setup

Unlike some kits that mount underneath the vehicle, this harness installs inside the trunk area where it stays out of the weather. The connectors plug in behind the interior panels, so there’s no need to run wires outside or worry about exposure to road grime or moisture. It’s a clean, hidden setup that keeps everything protected.

Plug-In Connections for a Simple DIY Install: No Cutting or Splicing

This Curt T-Connector uses factory-style plugs that match the vehicle’s existing tail light connectors. You just unplug the lights, insert the harness inline, and you’re done—no cutting, crimping, or splicing required. It’s a quick job you can handle yourself with standard tools.

Powered Converter for Reliable Trailer Lighting: Consistent 4-Flat Output

The built-in powered converter draws power directly from the vehicle’s battery instead of the lighting circuit, giving you a steady current for your trailer lights. The 4-flat connector provides running, turn, and brake light signals so your trailer lights work every time without overloading your vehicle wiring.

Ready for Basic Towing Needs: Standard 4-Way Flat Connector

When it’s time to hook up a small trailer, boat, or utility hauler, this harness gives you the standard 4-way flat connection used on most light-duty trailers. It covers all basic lighting functions so you can tow safely and stay legal on the road.

Comparison image showing Curt T-Connector vehicle wiring harnesses with 4-pole flat trailer connectors, highlighting design and connector differences for vehicle trailer wiring compatibility.

56402 CURT T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Similar to Tekonsha 118776

Installation Details C56402 Installation instructions

This Product Fits The Following Vehicles






Customers Who Purchased This Custom Fit Vehicle Wiring Also Bought...



Customer Satisfaction Score:

Ratings & Reviews

4.9

12 reviews
5 Stars
(11)
4 Stars
(1)
3 Stars
(0)
2 Stars
(0)
1 Star
(0)
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by:
Honda Accord
It worked great and is high quality. I appreciate being able to plug in this wire harness and not splice the wires. The double sided sticky tape was old and did not stick, but I had already planned on using my 3M double sided tape. The wires were the perfect length for my Honda Accord.
by:
Great! No problem whatsoever!
Nancy profile picture

Nancy

5/12/2025

Great product. No complaints after using it for a year.

Kate F. profile picture
Etrailer Expert

Kate F.

5/19/2025

@Nancy Glad we had the right fit for you Nancy!
by:
Well made. Installation of the line to the battery under the car a bit difficult, but not the fault of the product, as all similar products require this for safety of the vehicle electrical system
by:
hooked right up
by:
easy to innstall
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2019 Honda Accord
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2019 Honda Accord
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2022 Honda Accord
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See what our Experts say about this CURT Custom Fit Vehicle Wiring

Do you have a question about this Custom Fit Vehicle Wiring?
  • Recommended Trailer Hitch and Ball Mount for a 2020 Honda Accord Sport
    Hey Jefry, for your 2020 Honda Accord Sport you can use the Curt Trailer Hitch Receiver # C11525 with the Draw-Tite Drawbar # 3593 and the 2" Hitch Ball # 19258. This hitch has a bolt-on design as well as a 2,000 lb capacity which should be plenty to tow your jet skis. The last thing you'll need is a wiring harness # C56402 to give your trailer the necessary lighting to be road legal. Hola, Jefry. Para tu Honda Accord Sport 2020, puedes usar el receptor de enganche de remolque Curt...
    view full answer...
  • Recommended Hitch and Wiring Harness for a 019 Honda Accord Touring Hybrid
    To add a hitch to your 2019 Honda Accord Touring hybrid, you will need the Draw-Tite Trailer Hitch item # 24972 you were looking at. This hitch is custom fit and bolts to your Honda with included hardware. This is a class I hitch with a 1-1/4" receiver and the only available option for the hybrid models. I have linked an installation video below. To add a 4-way connector to your Honda, I recommend the Curt T-Connector Vehicle Wiring Harness item # C56402. This custom fit wiring harness...
    view full answer...
  • How Do I Locate an Installer Who Will Be Able To Install Trailer Hitch Receiver on 2019 Honda Accord
    On our product page for the Draw-Tite Sportframe Trailer Hitch Receiver # 24972 just below the product images and installation video you will see a link "Locate installers near me". This will allow you to see the most updated list of installers who have partnered with us to have a receiver installed on your 2019 Honda Accord Hybrid Touring. I do recommend having the Curt T-Connector Vehicle Wiring Harness # C56402 also installed with the receiver. This will allow you to connect to the...
    view full answer...
  • Can 2018 Honda Accord Tow Small Motorcycle Trailer
    We do have hitches that fit your 2018 Honda Accord Sport so with one installed like the Draw Tite part # 24972 you could tow a small trailer like you mentioned. You'd also need trailer wiring like the # C56402 and a ball mount # 3592.
    view full answer...
  • Will The Curt Trailer Hitch Receiver C11525 Fit a 2022 Honda Accord Sport Hybrid?
    Your 2022 Honda Accord Sport being a hybrid will require the Draw-Tite Sportframe Trailer Hitch Receiver # 24972. The Curt Trailer Hitch Receiver # C11525 you received for your 2021 Honda Accord Sport will not fit on hybrid models. The Curt T-Connector Vehicle Wiring Harness # C56402 will give you a 4-way flat connector on your 2022 Accord. This will allow you to connect to the tail lights on most small trailers or use Auxiliary Lights # C53201 if you are carrying a hitch mounted accessory...
    view full answer...
  • Is There A 2" Trailer Hitch Receiver Available For a 2018 Honda Accord 2.0 Touring?
    Currently I only see a 1-1/4" Receiver # 24972 available for your 2018 Honda Accord. We do have an Adapter # HT5R which can be used to convert the 1-1/4" to a 2" but this will reduce the rated capacity by 50%. So for the receiver it would then max out at 100lbs of tongue weight depending on your cargo load. I have heard of people either having their own receiver fabricated or altering a receiver with a different Tube # 325-GH-002. But understand this will void any warranty from the receiver...
    view full answer...
  • Is Wiring Harness Installed on Outside of 2018 Honda Accord
    I am not quite sure which part you are referring to specifically but the Curt T-Connector Vehicle Wiring Harness # C56402 or T-One Vehicle Wiring Harness # 118776 will install in the trunk of your 2018 Honda Accord, inside the car, as opposed to outside. To complete your towing set up, if you also need a hitch for your 2018 Honda Accord I recommend the Curt Trailer Hitch Receiver # C11525.
    view full answer...
  • Will Fascia Still Line Up with Other Panels After Installing a Trailer Hitch on a 2018 Honda Accord
    Yes, the rear fascia will still line up with other panels after installation of the Curt trailer hitch # C11525 on your 2018 Honda Accord. There is enough space in the stock set up to allow for the hitch to fit without compromising the fit of the fascia relative to the other panels. If you tow the recommended ball mount is # 3593 and you can use 1-7/8 inch ball # 19256 or 2 inch ball # 19258. For trailer wiring you can use # C56402 to add a 4-Way connector to the rear of the vehicle.
    view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Cole B
Installed by:
Cole B
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Ronnie R
Written by:
Ronnie R
Employee Conner L
Test Fit:
Conner L
Employee Bradley B
Test Fit:
Bradley B
Employee Thomas T
Video by:
Thomas T

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